Cooling system for combustion engines



March 18 1924. 1,487,166

E. T. KERSHAW COOLING SYSTEM FOR COMBUSTION ENGINES Filed Oct. 17. 1923 I N VEN TOR.

BY, v M ATTORNEYS.

' when the boat to which atented 18, 1924s ice.

EDWIN r. xnnsnaw, or DENVER, comma.

COOLING SYSTEM FOR COMBUSTION ENGINES.

Application filed ctober 17, 1923. 'Seria1-No. 669,133. I

and exact description of the invention, such I as will enable others skilled in the art to which it appertains to make and use the.

same.

This invention relates to improvements in cooling systems for internal combustion engines and more particularly to that type of engine known as outboard motors which are used for driving rowboats and the like.

In accordance with this invention cooling.

water is supplied to the engine cylinder or cylinders by means of the scoop 1n such a manner that water is caused to circulate the engine is attached is moving through the water. The invention aims to provi e a cooling system of the type indicated which shall be'reliable in operation and which can be manufac- Y cated at 12 and disposed at either end of a tured at a very low cost. r,

Referring to the drawings, Fig. 1 shows the stern of a rowboat equipped with an outboard motor provided with the improved cooling system;

F Fig. 2 is a section taken on line 22 of 1g. 3; Fig. 3 is a fragmentary view in rear elevation of the motor shown in Fi 1, the

section being taken on line 3-3 0 Fig. 2;

Fig. 4 is an end elevation, of Fig. 3 looking in-the direction of the arrows on line 2-2 of Fig. 3,'showing the preferred construction for controlling the flow 'of water through the circulating system, such constructlon taking the form of a shutter for regulatin Fig. 5 5

outlet. I

In the drawin numeral indicates a conventional row oat or the like to which is secured an outboard motor generally indicated at 11. The motor shown is ofthe two-cylinder type, t

ows a modified form of discharge He cylinders being indi- ,yoke-like frame 13.- The engine is; hung on a horizontally disposed pivot 14 and 15 inthe size of the discharge orifice;

dicates the handle by means of which. the

engine is tilted on the pivot 14 to properly position the propeller 16.

Disposed around each engine cylinder 12 is a casing 17 which has a downwardly directed scoop 18. This scoop is of a length .to project into the waterand extends tangentially from the casingat the lower slde of the. same. The scoop and easing are conveniently made in one iece from sheet iron and the scoop is *pre erably of the same width as the casing to insure adequate or proper circulation" of the Water.

The point of discharge of the cooling water may conveniently be at an axial end of the casing as indicated at 19 and the size of this opening may be regulated b ashutter 20. The shutteramay be hel in fixed position by any suitable means as by thumb screw 21. 7

An alternative construction of discharge for the cooling water may take the form'of openings 19' stamped out of the cylindrical surface of the casing as shown in Fig. 5.- Means for regulating the size of these open ings may or may not be provided.

It will be understood that the size of the discharge openings will regulate the rate of flow of the cooling water around-the engine cylinder.

Tlie casing 17 together with the scoop 18 is preferably adjustably mounted on the engine cylinder so as to enable the scoop 18 to be positioned in the most satisfactory manner depending upon the depth of the propeller 16' in the water. means may conveniently take the form of "str'apsf22 secured about the cylindrical bod of the casing and having a clamping bo t and wing nut 23 associated therewith for exerting the necessary clampingactiom'the bolt passing through lugs 24 projecting from one end of the straps 22. n

The apparatus forming'the cooling system of this invention is extremely simple but it is reliable in use and has the advantage may

and reference is therefore to be had to the appended claims for the scope of the invention. v

The securing of being capable of easy installation. 4 .It' is apparent that the detailed construction be varied within wide limits withoutdeparting from the spirit of the invention What I claim is:

IfIn combination with. an outboard motor adapted to be swung about a horizontal pivot, of a scoop for conducting waterto the engine cylinder, a casing surrounding the cylinder and in connection with the scoop. v

2. In combination with an outboard motor adapted to be swung about a horizontal pivot, of a water casing surrounding the engine cylinder, a scoop leading from said casing and directed downward y, said casing having an opening through which v water received within the casing y means ofsaid scoop may be discharged 3. The combination as specified in claim reamed 2 characterized by means for varying the size of the discharge opening.

4:. The combination as s eciiied in claim 2, and means for rotatab y adjusting the casingon the c linder.

5. In an out oard motor in combination with the engine cylinder oi a water casing surrounding the cylinder, a scoop extending tangentially from said casing the latter having a discharge opening at a'point adjacent said scoop.

6. The combination as specified in claim 5, said scoop being as wide as the casing.

In testimony whereof he adixes his signature. a

' EDWIN 'I. KERSIIAW, 

